LOS ANGELES (AP) — A Los Angeles judge has postponed the trial in the “Grim Sleeper” serial killings after prosecutors complained they weren’t prepared to present evidence next month.

Judge Kathleen Kennedy on Monday set jury selection for Oct. 14 in the case of Lonnie Franklin Jr., who has pleaded not guilty to 10 murder counts.

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The delay comes six months after anguished victims’ family members pleaded with Kennedy to set a court date in the killings dating back 30 years. Kennedy had set a June date, but then postponed it until September.

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Prosecutors sought a delay because they hadn’t received reports by potential defense expert witnesses.

Kennedy gave the defense until Aug. 31 to turn over the reports and wants to hear personally from a DNA expert if he can’t meet that deadline.

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